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A077340 Final terms of rows in A077339. 6
1, 20, 31, 42, 53, 64, 75, 86, 97, 108, 119, 1200, 1301, 1402, 1503, 1604, 1705, 1806, 1907, 2008, 2109, 2210, 2311, 2412, 2513, 2614, 2715, 2816, 2917, 3018, 3119, 3220, 3321, 3422, 3523, 3624, 3725, 3826, 3927, 4028 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

n-th number beginning with n. Can anyone derive a formula for a(n)?

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

FORMULA

From Robert Israel, Aug 08 2018: (Start)

a(m+(10^k+8)/9) = 10^k*(m+(10^k+8)/9)+m for 0 <= m < 10^k.

G.f.: (1-x)^(-2)*(x+x^2 + Sum_{k>=1} ((10^(2*k-1)+7*10^(k-1))*x^((10^k+8)/9) + (-10^(2*k-1)+2*10^(k-1))*x^((10^k+17)/9))).

(End)

MAPLE

seq(seq(10^k*(m+(10^k+8)/9)+m, m=0..10^k-1), k=0..3); # Robert Israel, Aug 08 2018

PROG

(PARI) A077340(n)=A077339(n, n) \\ M. F. Hasler, Jan 07 2013

CROSSREFS

Cf. A077339, A077341, A077342, A077343.

Sequence in context: A113760 A053679 A158844 * A077343 A218793 A116131

Adjacent sequences:  A077337 A077338 A077339 * A077341 A077342 A077343

KEYWORD

base,easy,nonn

AUTHOR

Amarnath Murthy, Nov 05 2002

EXTENSIONS

Definition corrected by M. F. Hasler, Jan 07 2013

STATUS

approved

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Last modified February 24 16:26 EST 2020. Contains 332209 sequences. (Running on oeis4.)