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 A276617 Square array A(n,k) = A276955(n,k)/k!, read by descending antidiagonals as A(1,1), A(1,2), A(2,1), A(1,3), A(2,2), A(3,1), etc. 6
 1, 1, 3, 1, 4, 4, 1, 5, 6, 5, 1, 6, 8, 7, 7, 1, 7, 10, 9, 13, 9, 1, 8, 12, 11, 21, 16, 10, 1, 9, 14, 13, 31, 25, 18, 11, 1, 10, 16, 15, 43, 36, 28, 19, 13, 1, 11, 18, 17, 57, 49, 40, 29, 25, 15, 1, 12, 20, 19, 73, 64, 54, 41, 41, 28, 16, 1, 13, 22, 21, 91, 81, 70, 55, 61, 45, 30, 17, 1, 14, 24, 23, 111, 100, 88, 71, 85, 66, 48, 31, 18 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS FORMULA A(n,k) = A276955(n,k)/k! EXAMPLE The top left corner of the array: 1,  1,  1,  1,  1,  1,  1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1 3,  4,  5,  6,  7,  8,  9,  10,  11,  12,  13,  14,  15,  16,  17,  18,  19 4,  6,  8, 10, 12, 14, 16,  18,  20,  22,  24,  26,  28,  30,  32,  34,  36 5,  7,  9, 11, 13, 15, 17,  19,  21,  23,  25,  27,  29,  31,  33,  35,  37 7, 13, 21, 31, 43, 57, 73,  91, 111, 133, 157, 183, 211, 241, 273, 307, 343 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361 PROG (Scheme) (define (A276617 n) (A276617bi (A002260 n) (A004736 n))) (define (A276617bi row col) (/ (A276955bi row col) (A000142 col))) CROSSREFS Transpose: A276616. Cf. A000142, A276955. Columns 1-3: A273670, A276931, A276934. Row 1: A000012, Row 2: n+2, Row 3: 2n+2, Row 4: 2n+3 (for n >= 1). Row 5: A002061 (from a(3)=7 onward). Row 6: squares (A000290, from a(3)=9 onward). Row 7: A028552 (from a(2)=10 onward). Row 8: A028387 (from a(2)=11 onward). Sequence in context: A054907 A245539 A089554 * A276616 A286623 A246340 Adjacent sequences:  A276614 A276615 A276616 * A276618 A276619 A276620 KEYWORD nonn,base,tabl AUTHOR Antti Karttunen, Sep 22 2016 STATUS approved

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Last modified January 16 21:37 EST 2019. Contains 319206 sequences. (Running on oeis4.)