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A255286
Set x=3 in polynomial corresponding to A253091(n).
1
1, 7, 13, 55, 142, 715, 757, 5299, 9841, 39367, 98422, 511771, 570862, 3818644, 7421206, 29800819, 74505454, 387410647, 387440173, 2712081211, 5036722249, 21309209515, 55016504566, 277019723695, 293292210961, 2053045476727, 3812798742493, 15251194969975, 38127987424942
OFFSET
0,2
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Feb 21 2015
STATUS
approved