A132128 A051340 + A000027 - A000012.

1, 2, 4, 4, 5, 8, 7, 8, 9, 13, 11, 12, 13, 14, 19, 16, 17, 18, 19, 20, 26, 22, 23, 24, 25, 26, 27, 34, 29, 30, 31, 32, 33, 34, 35, 43, 37, 38, 39, 40, 41, 42, 43, 44, 53

Offset

1,2

Comments

Row sums = A132127: (1, 6, 17, 37, 69, 116, 181, ...).

Links

Table of n, a(n) for n=1..45.

Formula

A051340 + A000027 - A000012 as infinite lower triangular matrices.

Example

First few rows of the triangle:
   1;
   2,  4;
   4,  5,  8;
   7,  8,  9, 13;
  11, 12, 13, 14, 19;
  16, 17, 18, 19, 20, 26;
  ...

Crossrefs

Cf. A051340, A000027, A000012, A132127.

Sequence in context: A340761 A035625 A219875 * A280057 A257174 A327625

Adjacent sequences: A132125 A132126 A132127 * A132129 A132130 A132131

Keyword

nonn,tabl

Author

Gary W. Adamson, Aug 10 2007

Status

approved