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A018853
a(n)^4 is smallest fourth power beginning with n.
9
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
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
KEYWORD
nonn,base
EXTENSIONS
Added initial 0. - Seiichi Manyama, Jan 30 2017
STATUS
approved