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 A134235 Triangle read by rows: a(1) = 1; then n-th row = n terms of (n+2), (n+4), (n+6), ..., n. 0
 1, 4, 2, 5, 7, 3, 6, 8, 10, 4, 7, 9, 11, 13, 5, 8, 10, 12, 14, 16, 6, 9, 11, 13, 15, 17, 19, 7, 10, 12, 14, 16, 18, 20, 22, 8, 11, 13, 15, 17, 19, 21, 23, 25, 9, 12, 14, 16, 18, 20, 22, 24, 26, 28, 10 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row sums = the hexagonal numbers, A000384: (1, 6, 15, 28, 45, 66, 91, ...). LINKS EXAMPLE First few rows of the triangle: 1; 4, 2; 5, 7, 3; 6, 8, 10, 4; 7, 9, 11, 13, 5; 8, 10, 12, 14, 16, 6; 9, 11, 13, 15, 17, 19, 7; ... CROSSREFS Cf. A000384. Sequence in context: A260623 A199625 A020849 * A266626 A159979 A198233 Adjacent sequences: A134232 A134233 A134234 * A134236 A134237 A134238 KEYWORD nonn,tabl AUTHOR Gary W. Adamson, Oct 14 2007 STATUS approved

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Last modified March 30 04:44 EDT 2023. Contains 361603 sequences. (Running on oeis4.)