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A071827 Concatenate first n terms of A007770 in reverse order. 1
1, 71, 1071, 131071, 19131071, 2319131071, 282319131071, 31282319131071, 3231282319131071, 443231282319131071, 49443231282319131071, 6849443231282319131071, 706849443231282319131071, 79706849443231282319131071, 8279706849443231282319131071, 868279706849443231282319131071 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

Shyam Sunder Gupta, Smarandache Sequence of Happy Numbers, Smarandache Notions Journal, Vol. 13 (2002).

LINKS

Table of n, a(n) for n=1..16.

EXAMPLE

a(3)=1071 because 10,7,1 are consecutive terms of A007770 in reverse order.

CROSSREFS

Cf. A007770.

Sequence in context: A200909 A175215 A231414 * A289899 A267475 A241940

Adjacent sequences: A071824 A071825 A071826 * A071828 A071829 A071830

KEYWORD

easy,base,nonn,less

AUTHOR

Shyam Sunder Gupta, Jun 08 2002

EXTENSIONS

a(11) and following corrected by Georg Fischer, Dec 30 2022

STATUS

approved

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Last modified February 3 21:17 EST 2023. Contains 360045 sequences. (Running on oeis4.)