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 A272171 Triangle read by rows: T(n,k) in which row n lists the first n terms of A000005 in reverse order. 2
 1, 2, 1, 2, 2, 1, 3, 2, 2, 1, 2, 3, 2, 2, 1, 4, 2, 3, 2, 2, 1, 2, 4, 2, 3, 2, 2, 1, 4, 2, 4, 2, 3, 2, 2, 1, 3, 4, 2, 4, 2, 3, 2, 2, 1, 4, 3, 4, 2, 4, 2, 3, 2, 2, 1, 2, 4, 3, 4, 2, 4, 2, 3, 2, 2, 1, 6, 2, 4, 3, 4, 2, 4, 2, 3, 2, 2, 1, 2, 6, 2, 4, 3, 4, 2, 4, 2, 3, 2, 2, 1, 4, 2, 6, 2, 4, 3, 4, 2, 4, 2, 3, 2, 2, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Table of n, a(n) for n=1..105. FORMULA a(n) = A000005(A004736(n)). T(n,k) = A000005(n-k+1). EXAMPLE Triangle begins: 1; 2, 1; 2, 2, 1; 3, 2, 2, 1; 2, 3, 2, 2, 1; 4, 2, 3, 2, 2, 1; 2, 4, 2, 3, 2, 2, 1; 4, 2, 4, 2, 3, 2, 2, 1; 3, 4, 2, 4, 2, 3, 2, 2, 1; 4, 3, 4, 2, 4, 2, 3, 2, 2, 1; 2, 4, 3, 4, 2, 4, 2, 3, 2, 2, 1; 6, 2, 4, 3, 4, 2, 4, 2, 3, 2, 2, 1; ... CROSSREFS Column k gives A000005 starting in row k. Row sums give A006218, n >= 1. Cf. A004736, A104887, A272172. Sequence in context: A205451 A227899 A208244 * A160696 A152545 A359538 Adjacent sequences: A272168 A272169 A272170 * A272172 A272173 A272174 KEYWORD nonn,tabl AUTHOR Omar E. Pol, Apr 21 2016 STATUS approved

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Last modified May 18 07:16 EDT 2024. Contains 372618 sequences. (Running on oeis4.)