



1, 2, 2, 2, 4, 6, 4, 2, 4, 8, 10, 8, 10, 14, 8, 2, 4, 8, 10, 10, 14, 22, 22, 12, 10, 20, 28, 24, 26, 32, 16, 2, 4, 8, 10, 10, 14, 22, 22, 14, 14, 26, 38, 38, 38, 50, 46, 20, 10, 20, 28, 30, 38, 58, 66, 44, 30, 48, 70, 64, 64, 70, 32, 2, 4, 8
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

2,2


REFERENCES

S. Ulam, On some mathematical problems connected with patterns of growth of figures, pp. 215224 of R. E. Bellman, ed., Mathematical Problems in the Biological Sciences, Proc. Sympos. Applied Math., Vol. 14, Amer. Math. Soc., 1962. See Example 3.


LINKS

Table of n, a(n) for n=2..67.


CROSSREFS

Cf. A161644, A161645, A182634, A139250.
Sequence in context: A278231 A152968 A222177 * A240433 A217637 A231515
Adjacent sequences: A342268 A342269 A342270 * A342272 A342273 A342274


KEYWORD

nonn


AUTHOR

N. J. A. Sloane, Mar 11 2021


STATUS

approved



