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 A272172 Triangle read by rows: T(n,k) in which row n lists the first n terms of A000203 in reverse order. 4
 1, 3, 1, 4, 3, 1, 7, 4, 3, 1, 6, 7, 4, 3, 1, 12, 6, 7, 4, 3, 1, 8, 12, 6, 7, 4, 3, 1, 15, 8, 12, 6, 7, 4, 3, 1, 13, 15, 8, 12, 6, 7, 4, 3, 1, 18, 13, 15, 8, 12, 6, 7, 4, 3, 1, 12, 18, 13, 15, 8, 12, 6, 7, 4, 3, 1, 28, 12, 18, 13, 15, 8, 12, 6, 7, 4, 3, 1, 14, 28, 12, 18, 13, 15, 8, 12, 6, 7, 4, 3, 1, 24, 14, 28 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Table of n, a(n) for n=1..94. FORMULA a(n) = A000203(A004736(n)). T(n,k) = A000203(n-k+1). EXAMPLE Triangle begins: 1; 3, 1; 4, 3, 1; 7, 4, 3, 1; 6, 7, 4, 3, 1; 12, 6, 7, 4, 3, 1; 8, 12, 6, 7, 4, 3, 1; 15, 8, 12, 6, 7, 4, 3, 1; 13, 15, 8, 12, 6, 7, 4, 3, 1; 18, 13, 15, 8, 12, 6, 7, 4, 3, 1; 12, 18, 13, 15, 8, 12, 6, 7, 4, 3, 1; 28, 12, 18, 13, 15, 8, 12, 6, 7, 4, 3, 1; ... CROSSREFS Mirror of A245093. Column k gives A000203 starting in row k. Row sums give A024916. Cf. A004736, A104887, A272171. Sequence in context: A030758 A347065 A322103 * A104764 A152842 A307280 Adjacent sequences: A272169 A272170 A272171 * A272173 A272174 A272175 KEYWORD nonn,tabl AUTHOR Omar E. Pol, Apr 21 2016 STATUS approved

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Last modified May 18 09:54 EDT 2024. Contains 372620 sequences. (Running on oeis4.)