A151735 a(0)=0, a(1)=1; for n>21, a(n) = (A151725(n)+7)/4.

0, 1, 4, 5, 10, 11, 16, 21, 32, 33, 38, 43, 54, 61, 76, 95, 118, 119, 124, 129, 140, 147, 162, 181, 204, 211, 226, 247, 276, 305, 354, 413, 460, 461, 466, 471, 482, 489, 504, 523, 546, 553, 568, 589, 618, 647, 696, 755, 802, 809, 824, 845, 874, 903, 952, 1013, 1066, 1095, 1146

Offset: 0

Author

N. J. A. Sloane, Jun 15 2009

Keywords

• nonn

Comments

The number of cells after n generations in one quadrant of the CA in A151725.

The first differences (starting at a(2)) give A151737.

Crossrefs

Cf. A151746.