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A046199
Indices of pentagonal numbers which are also heptagonal.
+0
3
1, 54, 3337, 206830, 12820113, 794640166, 49254870169, 3053007310302, 189237198368545, 11729653291539478, 727049266877079081, 45065324893087363534, 2793323094104539460017, 173140966509588359157510
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.
AT&T Labs Research
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