A018853 a(n)^4 is smallest fourth power beginning with n.

0, 1, 4, 14, 8, 15, 5, 29, 3, 31, 10, 33, 6, 19, 11, 35, 2, 65, 37, 21, 12, 68, 69, 22, 7, 4, 72, 23, 13, 74, 132, 42, 134, 24, 43, 77, 138, 44, 14, 25, 8, 45, 144, 81, 46, 26, 147, 83, 47, 84, 15, 151, 85, 27, 86, 273, 154, 49, 276, 88, 157, 28, 5, 159, 283, 9, 286, 51, 91, 289, 29

Offset

0,3

Links

Seiichi Manyama, Table of n, a(n) for n = 0..10000

Formula

a(n^4) = n for n >= 0. - Seiichi Manyama, Jan 30 2017

Prog

(PARI) v=[]; k=1; while(#v<100, d=digits(k^4); D=digits(#v+1); if(#D<=#d, c=1; for(i=1, #D, if(D[i]!=d[i], c=0; break)); if(c, v=concat(v, k); k=0)); k++); v \\ Derek Orr, Aug 12 2015

Crossrefs

Cf. A018798 (a(n)^4).

Cf. A018851 (k=2), A018852 (k=3), this sequence (k=4), A018872 (k=5), A018874 (k=6), A018876 (k=7), A018878 (k=8), A018880 (k=9), A018882 (k=10).

Sequence in context: A185439 A304458 A133856 * A218257 A193377 A202731

Adjacent sequences: A018850 A018851 A018852 * A018854 A018855 A018856

Keyword

nonn,base

Author

David W. Wilson

Extensions

Added initial 0. - Seiichi Manyama, Jan 30 2017

Status

approved