This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A307644 #11 Feb 16 2025 08:33:55 %S A307644 1,1,0,0,0,1,1,0,0,0,1,3,0,6,0,27,13,59,390,661,4933,9760,49415, %T A307644 101967,341887,702884,2209559,5361004,15472531,34165997,82258594, %U A307644 193682533,490404772,1210929426,2725005202,6283337761,13672859806,34906926846 %N A307644 Number of partitions of n^4 into exactly n nonzero fourth powers. %H A307644 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/BiquadraticNumber.html">Biquadratic Number</a> %e A307644 11^4 = %e A307644 1^4 + 2^4 + 2^4 + 4^4 + 4^4 + 4^4 + 4^4 + 6^4 + 8^4 + 8^4 + 8^4 = %e A307644 2^4 + 2^4 + 2^4 + 2^4 + 2^4 + 2^4 + 6^4 + 6^4 + 6^4 + 8^4 + 9^4 = %e A307644 2^4 + 2^4 + 2^4 + 4^4 + 6^4 + 6^4 + 6^4 + 6^4 + 6^4 + 6^4 + 9^4, %e A307644 so a(11) = 3. %Y A307644 Cf. A000583, A259793, A299169, A299195, A307643, A319435. %K A307644 nonn %O A307644 0,12 %A A307644 _Ilya Gutkovskiy_, Apr 19 2019 %E A307644 a(20)-a(28) from _Vaclav Kotesovec_, Apr 20 2019 %E A307644 a(29)-a(37) from _Vaclav Kotesovec_, Apr 23 2019