The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A286623 Square array A(n,k) = A276943(n,k)/A002110(n-1), read by descending antidiagonals A(1,1), A(1,2), A(2,1), A(1,3), A(2,2), A(3,1), etc. 8
 1, 3, 1, 4, 4, 1, 5, 6, 6, 1, 7, 7, 10, 8, 1, 9, 16, 11, 14, 12, 1, 10, 19, 36, 15, 22, 14, 1, 11, 21, 41, 78, 23, 26, 18, 1, 13, 22, 45, 85, 144, 27, 34, 20, 1, 15, 31, 46, 91, 155, 222, 35, 38, 24, 1, 16, 34, 71, 92, 165, 235, 324, 39, 46, 30, 1, 17, 36, 76, 155, 166, 247, 341, 438, 47, 58, 32, 1, 18, 37, 80, 162, 287, 248, 357, 457, 668, 59, 62, 38, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS FORMULA A(n,k) = A276943(n, k) / A002110(n-1). EXAMPLE The top left 12 X 12 corner of the array:   1,  3,  4,  5,    7,    9,   10,   11,   13,   15,   16,   17   1,  4,  6,  7,   16,   19,   21,   22,   31,   34,   36,   37   1,  6, 10, 11,   36,   41,   45,   46,   71,   76,   80,   81   1,  8, 14, 15,   78,   85,   91,   92,  155,  162,  168,  169   1, 12, 22, 23,  144,  155,  165,  166,  287,  298,  308,  309   1, 14, 26, 27,  222,  235,  247,  248,  443,  456,  468,  469   1, 18, 34, 35,  324,  341,  357,  358,  647,  664,  680,  681   1, 20, 38, 39,  438,  457,  475,  476,  875,  894,  912,  913   1, 24, 46, 47,  668,  691,  713,  714, 1335, 1358, 1380, 1381   1, 30, 58, 59,  900,  929,  957,  958, 1799, 1828, 1856, 1857   1, 32, 62, 63, 1148, 1179, 1209, 1210, 2295, 2326, 2356, 2357   1, 38, 74, 75, 1518, 1555, 1591, 1592, 3035, 3072, 3108, 3109 PROG (Scheme) (define (A286623 n) (A286623bi (A002260 n) (A004736 n))) (define (A286623bi row col) (/ (A276943bi row col) (A002110 (- row 1)))) CROSSREFS Transpose: A286625. Cf. A002110, A276943. Row 1: A276155. Column 1: A000012, Column 2: A008864, Column 3: A100484, Column 4: A072055, Column 5: A023523 (from its second term onward), Column 6: A286624 (= 1 + A123134), Column 11: 2*A123134, Column 13: 3*A006094. Cf. A276616 (analogous array). Sequence in context: A089554 A276617 A276616 * A246340 A246354 A286625 Adjacent sequences:  A286620 A286621 A286622 * A286624 A286625 A286626 KEYWORD nonn,tabl AUTHOR Antti Karttunen, Jun 28 2017 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 27 04:57 EST 2020. Contains 331291 sequences. (Running on oeis4.)