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 A124458 Triangular array resulting from summing three repeated Pascal sequences; (related to the generalized pentagonal sequence (A001318) and the classical modular tessellation (cf. A054886). 2
 1, 2, 1, 3, 2, 1, 3, 4, 2, 1, 3, 5, 5, 2, 1, 3, 7, 7, 6, 2, 1, 3, 8, 12, 9, 7, 2, 1, 3, 10, 15, 18, 11, 8, 2, 1, 3, 11, 22, 24, 25, 13, 9, 2, 1, 3, 13, 26, 40, 35, 33, 15, 10, 2, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The third diagonal is the generalized pentagonal sequence A001318 LINKS Table of n, a(n) for n=1..55. EXAMPLE Consider 1.......1.......6.......6.......21......21.... ........1.......1.......6.......6.......21.... ................1.......1.......6.......6..... which sums to 1.....2....8.....13....33....48...., a diagonal of A124458 CROSSREFS Cf. A000012 A004526 A001651 A008805 A001318 A058187 A028724 A093039 A054886 (row sum). Sequence in context: A194959 A194921 A195079 * A199538 A324337 A002973 Adjacent sequences: A124455 A124456 A124457 * A124459 A124460 A124461 KEYWORD easy,nonn,tabl AUTHOR Alford Arnold, Nov 04 2006 STATUS approved

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Last modified December 11 07:17 EST 2023. Contains 367717 sequences. (Running on oeis4.)