

A308070


Numbers k such that k is the substring identical to the most significant digits of its base7 representation.


3



0, 1, 2, 3, 4, 5, 6, 102616333034, 102620103253, 103055445560, 206154633166, 206154633200, 212216263215, 212220033434, 315315450515, 321340554340, 424436332033, 424440102253, 430461435550, 430501403606, 533560623156, 533600556144
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OFFSET

1,3


COMMENTS

Numbers k whose base7 representation begins with the same digits as k itself.


LINKS



EXAMPLE

102616333034_10 = 10261633303415_7, which also begins with '102616333034'.


PROG

(PARI) isok(n) = my(vb=digits(n, 7), vd=digits(n)); vd == vector(#vd, k, vb[k]); \\ Michel Marcus, May 17 2019


CROSSREFS



KEYWORD

nonn,base


AUTHOR



STATUS

approved



