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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
OFFSET
1,2
REFERENCES
Shyam Sunder Gupta, Smarandache Sequence of Happy Numbers, Smarandache Notions Journal, Vol. 13 (2002).
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
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