A308071 -id:A308071 - cp's OEIS frontend

A308070 Numbers k such that k is the substring identical to the most significant digits of its base-7 representation.

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

Offset: 1

Scott R. Shannon, May 11 2019

Numbers k whose base-7 representation begins with the same digits as k itself.

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

Scott R. Shannon, Table of n, a(n) for n = 1..500

This is a subsequence of A228050.

See A181929, A307254, A307255, A307256, A307257, A308071, A308072 for other bases.

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

A308072 Numbers k such that k is the substring identical to the most significant digits of its base-9 representation.

Original entry on oeis.org

0, 1, 2, 3, 4, 5, 6, 7, 8, 1066338786883726756382, 1066338787045067082685, 1066338805156287287066, 1066338805156287287067, 1066338805156287300050, 1066338805156301216066, 1066341132816741837214, 1070235882243468707818, 1070235882243470056412, 1070236076684636644063

Offset: 1

Scott R. Shannon, May 11 2019

Numbers k whose base-9 representation begins with the same digits as k itself.

			1066338786883726756382_10 = 10663387868837267563825_9, which also begins with '1066338786883726756382'.

Scott R. Shannon, Table of n, a(n) for n = 1..500

This is a subsequence of A228052.

See A181929, A307254, A307255, A307256, A307257, A308070, A308071 for other bases.

isok(n) = my(vb=digits(n, 9), vd=digits(n)); vd == vector(#vd, k, vb[k]); \\ Michel Marcus, May 17 2019

cp's OEIS Frontend

A308070 Numbers k such that k is the substring identical to the most significant digits of its base-7 representation.

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