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A341151 a(n) is the sum of the n-th row of the A341150 triangle. 1
1, 1, 2, 2, 3, 3, 4, 2, 6, 5, 4, 4, 6, 5, 8, 6, 6, 6, 8, 4, 11, 8, 6, 8, 12, 6, 10, 8, 8, 10, 10, 6, 14, 13, 10, 12, 13, 8, 12, 10, 10, 11, 12, 10, 21, 10, 10, 6, 19, 11, 20, 18, 6, 21, 18, 8, 19, 14, 10, 12, 18, 12, 16, 14, 19, 22, 18, 10, 20, 18, 16, 14, 16 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..72.

Niccolò Castronuovo, On the number of fixed points of the map gamma, arXiv:2102.02739 [math.NT], 2021.

PROG

(PARI) incr(m, nn, vincr) = if ((vincr[1]<nn) && (vincr[2]<nn), m[vincr[1]+1, vincr[2]+1]++); m;

tabl(nn) = {my(m = matrix(nn, nn), istep=0, vstep, nvstep); for (istep=0, nn, if (istep==0, vstep = [[0, 0]], vstep = nvstep); nvstep = List(); for (i=1, #vstep, my(step=vstep[i]); m = incr(m, nn, step); if (istep, listput(nvstep, [step[1]+step[2], step[2]])); listput(nvstep, [3*step[1]+1-2*step[2], 2*step[1]+1-step[2]]); ); ); m; } \\ A341150

lista(nn) = my(m=tabl(nn)); vector(nn, i, vecsum(vector(i, k, m[i, k])));

CROSSREFS

Cf. A341150.

Sequence in context: A057955 A305788 A116473 * A006546 A031268 A237817

Adjacent sequences:  A341148 A341149 A341150 * A341152 A341153 A341154

KEYWORD

nonn

AUTHOR

Michel Marcus, Feb 06 2021

STATUS

approved

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Last modified August 11 22:55 EDT 2022. Contains 356067 sequences. (Running on oeis4.)